The overarching story hinges on several catastrophic revelations and climactic turning points:
- The Truth of Amira (Genesis): Amira is not an ancient divinity or an autonomous demon princess; she was artificially grown in a vat by the rogue demon Belial (disguised as Lavallée). Belial synthesized her from the flesh of the angel Nicole to create a living vessel capable of holding the stolen 'God Key' to unseal Bahamut. Her memories of a loving mother were false constructs implanted to guide her unwittingly into the sacrificial trap.
- The Sacrifice and Bahamut's Defeat (Genesis): In Episode 12, Amira is swallowed into the colossal body of the revived Bahamut. Favaro, accepting his role as the reluctant savior, wields the demon-slaying magic arm-cannon, shooting the sealing arrow into Bahamut's core while Amira kisses him goodbye. The seal severs Favaro's leg below the knee, and Amira disappears into oblivion, leaving Favaro to wander the earth with a prosthetic peg leg.
- Charioce's Secret Gambit (Virgin Soul): Throughout the sequel, King Charioce XVII appears to be a power-hungry imperialist subjugating demons and stripping the gods of their celestial energy. In Episode 22, it is revealed that royal seers calculated Bahamut's return was inevitable. Knowing the gods and demons were content merely to reseal Bahamut at terrible mortal cost, Charioce stole the sacred power to construct Dromos, a superweapon capable of destroying Bahamut permanently.
- The Murder of Mugaro (El): El, the sacred half-angel child of Jeanne d'Arc who possesses the power to neutralize Charioce's onyx technology, is cowardly assassinated by the desperate, ambitious knight Alessand. This death triggers a full-scale religious and demonic war on the capital, creating chaos just as Bahamut awakens.
- The Finale & Epilogue: In the apocalyptic final clash, Nina unlocks her ultimate dragon form out of love and grief. Working alongside Favaro, Kaisar, and Charioce, they discharge Dromos into Bahamut, successfully obliterating the dragon once and for all. The blast blinds Charioce permanently and burns Nina’s vocal cords. The series ends in peaceful simplicity: Charioce abdicates the throne, living quietly in the countryside where he dances with Nina in silence, while Favaro and Kaisar embark on another wandering adventure down the open road.